commit fe0a21acec1c73fae6dd75703e5d6b2876900721
Author: Matt Baer <matt@flashstuf.com>
Date:   Fri Feb 26 13:52:03 2016 -0500

    Write code
    
    ,.(:.---).

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..9f1365a
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*.swp
+cmd/cmd
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..b95357d
--- /dev/null
+++ b/README.md
@@ -0,0 +1,4 @@
+punctuation
+===========
+
+Words and symbols in, punctuation out. Inspired by an [article on punctuation in novels](https://medium.com/@neuroecology/punctuation-in-novels-8f316d542ec4).
diff --git a/cmd/main.go b/cmd/main.go
new file mode 100644
index 0000000..354959a
--- /dev/null
+++ b/cmd/main.go
@@ -0,0 +1,13 @@
+package main
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/thebaer/punctuation"
+)
+
+func main() {
+	o := punctuation.Extract(os.Stdin)
+	fmt.Println(o)
+}
diff --git a/punctuation.go b/punctuation.go
new file mode 100644
index 0000000..275329d
--- /dev/null
+++ b/punctuation.go
@@ -0,0 +1,25 @@
+// punctuation takes text and gives back only punctuation.
+package punctuation
+
+import (
+	"bufio"
+	"os"
+	"strings"
+)
+
+const validPunc = ";:'\",!?.-()"
+
+func Extract(f *os.File) string {
+	var out string
+	in := bufio.NewScanner(f)
+	for in.Scan() {
+		out += strings.Map(func(r rune) rune {
+			if strings.IndexRune(validPunc, r) >= 0 {
+				return r
+			}
+			return -1
+		}, in.Text())
+	}
+
+	return out
+}